Title :
A +10-dBm IIP3 SiGe mixer with IM3 cancellation technique
Author :
Otaka, Shoji ; Ashida, Mitsuyuki ; Ishii, Masato ; Itakura, Tetsuro
Author_Institution :
Corp. R&D Center, Kawasaki, Japan
Abstract :
A third-order intermodulation (IM3) cancellation technique using a submixer is proposed for a low-power low-distortion mixer. The IM3 cancellation is achieved by summing IM3 generated in a main mixer and the submixer, which are almost the same amplitude and opposite phase. The mixer was designed to operate at 870 MHz. The proposed technique reduces IM3 by 18 dB with a current increase of about 15% and is suitable for low-power applications. The mixer achieved an input-referred third-order intercept point (IIP3) of 10 dBm, a gain of 8.7 dB, and an NF of 9.8 dB and dissipates 30 mW from 2.9 V. The IC is fabricated in a SiGe bipolar transistor with fT= 30 GHz. The IC occupies 1.44 mm×1.44 mm.
Keywords :
bipolar transistor circuits; code division multiple access; interference suppression; intermodulation; mixers (circuits); phase shifters; 1.44 mm; 2.9 V; 30 GHz; 30 mW; 8.7 dB; 870 MHz; 9.8 dB; IC fabrication; IIP3 SiGe mixer; IM3 cancellation; SiGe; SiGe bipolar transistor; active mixer; code-division multiple access; input-referred third-order intercept point; linearization; low-distortion mixer; low-power applications; low-power mixer; phase shifter; submixer; third-order distortion; third-order intermodulation; Baseband; Bipolar integrated circuits; Energy consumption; Germanium silicon alloys; Intermodulation distortion; Linearity; Multiaccess communication; Phase distortion; Radio frequency; Silicon germanium; 65; Active mixer; CDMA; code-division multiple access; intermodulation; linearization; phase shifter; third-order distortion;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2004.836331
